Re: net: deadlock on genl_mutex

[Cong Wang]

On Thu, Dec 8, 2016 at 9:16 AM, Dmitry Vyukov <dvyukov@xxxxxxxxxx> wrote:
> Chain exists of:
>  Possible unsafe locking scenario:
>
>        CPU0                    CPU1
>        ----                    ----
>   lock(genl_mutex);
>                                lock(nlk->cb_mutex);
>                                lock(genl_mutex);
>   lock(rtnl_mutex);
>
>  *** DEADLOCK ***

This one looks legitimate, because nlk->cb_mutex could be rtnl_mutex.
Let me think about it.